Advanced filter on item code not working

I'm writing you because I'm having problems in using advanced filters on the 'Item code' dimension.

I'm trying to use an Advanced filter to make all the products SKUs tracked in GA adhere to the same sintax.I would like for all the product ids that begin with 'eProd' (eg: eProd212121) to be saved in GA as 'eSku' + the EAN number (so eSku212121).

I've tried to apply the following filter to the view with no results:

In order to test the filter, I tried it first on the 'Campaign name' dimension, where it works correctly.When I try to apply the same restraints to the dimension 'Item code' nothing changes.

Could you help me with this?Please let me know if further information are needed.